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An equal-segment stepped tunnel buffer structure and its design optimization method

A buffer structure and ladder structure technology, applied in design optimization/simulation, tunnel, multi-objective optimization and other directions, can solve the problems of difficult quality control, difficult construction, inconvenient production, etc., to achieve convenient and accurate construction, scientific and rigorous methods, shortening The effect of construction costs

Active Publication Date: 2022-08-02
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the trumpet-shaped buffer structure is poured, the formwork needs to be unfolded according to a certain curve or angle. The construction is difficult, the quality is difficult to control, and it is labor-intensive and inconvenient to manufacture. structure

Method used

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  • An equal-segment stepped tunnel buffer structure and its design optimization method
  • An equal-segment stepped tunnel buffer structure and its design optimization method
  • An equal-segment stepped tunnel buffer structure and its design optimization method

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Embodiment Construction

[0084] like figure 1 and figure 2 As shown in the figure, an equal-stage stepped tunnel 1 buffer structure designed by the present invention is a stepped structure arranged at the entrance of the tunnel 1, and the stepped structure is successively formed by a plurality of semi-annular stepped platforms 2 with the same cross-sectional shape as the tunnel 1. The lengths of a plurality of the step platforms 2 are all equal, and the radii decrease sequentially along the traveling direction of the train in the tunnel 1 .

[0085] A design and optimization method for a buffer structure of an equal-stage stepped tunnel 1, characterized in that it comprises the following steps:

[0086] S1. Determine the order of the stepped buffer structure and the total length of the stepped buffer structure:

[0087] Let the order be n and the total length be l h , then the position coordinate of the connection of the adjacent step platform 2 is x i =-(i / n)l h , the length of each buffer stru...

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Abstract

The invention provides an equal-stage stepped tunnel buffer structure and a design optimization method thereof. The buffer structure is an equal-stage stepped structure, and the design optimization method includes the following steps: S1, determining the order and the total length of the buffer structure; S2, Optimize the cross-sectional area of ​​each step of the buffer structure; S3, optimize the entrance of the buffer structure; S3, optimize the number of steps. The invention has strong practicability, and can design and optimize a stepped structure that is convenient for construction and has a good effect of buffering compression waves, so that the compression waves at the tunnel entrance show a state of approximately linear law growth, avoid the phenomenon of surge of compression waves, and have strong advantages. Pneumatic buffer protection function can be popularized and applied at the entrance of high-speed railway tunnels.

Description

technical field [0001] The invention belongs to the technical field of tunnel design and construction, and particularly relates to an equal-section stepped tunnel buffer structure and a design optimization method thereof. Background technique [0002] Usually, when a high-speed train enters a tunnel, the head of the train compresses the air in the tunnel to form a compression wave. This compression wave propagates along the tunnel at the speed of sound and is emitted outward through the tunnel exit in the form of micro-pressure waves. Due to the impulsive noise and low frequency vibration caused by the micro pressure wave to the surrounding private residences, it is very important to reduce the aerodynamic effect when designing the entrance of the high-speed railway tunnel. [0003] Aiming at the aerodynamic effect of high-speed railway tunnels, buffer structures are usually installed at the tunnel entrance, among which the horn-shaped buffer structure has the best buffer e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/28E21D9/14G06F111/06G06F113/08G06F119/14
CPCG06F30/13G06F30/28E21D9/14G06F2111/06G06F2113/08G06F2119/14
Inventor 闫亚光赵亚军李军张童童张立功赵志超周海波张晓明
Owner HEBEI UNIV OF ENG
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